67720972 has 24 divisors (see below), whose sum is σ = 130314240. Its totient is φ = 30537360.

The previous prime is 67720951. The next prime is 67720973. The reversal of 67720972 is 27902776.

It is a super-2 number, since 2×67720972² = 9172260097249568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67720973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472 + ... + 11647.

It is an arithmetic number, because the mean of its divisors is an integer number (5429760).

Almost surely, 2^67720972 is an apocalyptic number.

It is an amenable number.

67720972 is a deficient number, since it is larger than the sum of its proper divisors (62593268).

67720972 is a wasteful number, since it uses less digits than its factorization.

67720972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12261 (or 12259 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 67720972 is about 8229.2753022365. The cubic root of 67720972 is about 407.6064624541.

The spelling of 67720972 in words is "sixty-seven million, seven hundred twenty thousand, nine hundred seventy-two".